zcash private tx support

lib/database.js

@@ -150,7 +150,7 @@ function save_tx(txid, cb) {
       lib.get_block(tx.blockhash, function(block){
         if (block) {
           lib.prepare_vin(tx, function(vin) {
-            lib.prepare_vout(tx.vout, txid, vin, function(vout, nvin) {
+            lib.prepare_vout(tx.vout, txid, vin, ((typeof tx.vjoinsplit === 'undefined' || tx.vjoinsplit == null) ? [] : tx.vjoinsplit), function(vout, nvin) {
               lib.syncLoop(vin.length, function (loop) {
                 var i = loop.iteration();
                 update_address(nvin[i].addresses, txid, nvin[i].amount, 'vin', function(){

lib/explorer.js

@@ -288,7 +288,7 @@ module.exports = {
     });
   },
 
-  prepare_vout: function(vout, txid, vin, cb) {
+  prepare_vout: function(vout, txid, vin, vhidden, cb) {
     var arr_vout = [];
     var arr_vin = [];
     arr_vin = vin;
@@ -324,7 +324,24 @@ module.exports = {
         loop.next();
       }
     }, function(){
-      if (vout[0].scriptPubKey.type == 'nonstandard') {
+      // check for hidden/anonymous outputs
+      vhidden.forEach(function(vanon, i) {
+        if (vanon.vpub_old > 0) {
+          module.exports.convert_to_satoshi(parseFloat(vanon.vpub_old), function(amount_sat){
+            arr_vout.push({addresses:"private_tx", amount:amount_sat});
+          });
+        } else {
+          module.exports.convert_to_satoshi(parseFloat(vanon.vpub_new), function(amount_sat){
+            if (vhidden.length > 0 && (!vout || vout.length == 0) && (!vin || vin.length == 0)) {
+              // add a private out address for the special case where hidden sender is sending to hidden recipient
+              arr_vout.push({addresses:"private_tx", amount:amount_sat});
+            }
+            arr_vin.push({addresses:"private_tx", amount:amount_sat});
+          });
+        }
+      });
+
+      if (typeof vout[0] !== 'undefined' && vout[0].scriptPubKey.type == 'nonstandard') {
         if ( arr_vin.length > 0 && arr_vout.length > 0 ) {
           if (arr_vin[0].addresses == arr_vout[0].addresses) {
             //PoS

lib/locale.js

@@ -55,6 +55,8 @@ exports.bits = "Bits",
 exports.nonce = "Nonce",
 exports.new_coins = "New Coins",
 exports.proof_of_stake = "PoS",
+exports.hidden_sender = "Hidden Sender",
+exports.hidden_recipient = "Hidden Recipient",
 exports.initial_index_alert = "Indexing is currently incomplete, functionality is limited until index is up-to-date.",
 
 exports.a_menu_showing = "Showing",

locale/en.json

@@ -57,6 +57,8 @@
     "nonce": "Nonce",
     "new_coins": "New Coins",
     "proof_of_stake": "PoS",
+    "hidden_sender": "Hidden Sender",
+    "hidden_recipient": "Hidden Recipient",
     "initial_index_alert": "Indexing is currently incomplete, functionality is limited until index is up-to-date.",
 
     //address menu

routes/index.js

@@ -49,7 +49,7 @@ function route_get_tx(res, txid) {
         lib.get_rawtransaction(txid, function(rtx) {
           if (rtx.txid) {
             lib.prepare_vin(rtx, function(vin) {
-              lib.prepare_vout(rtx.vout, rtx.txid, vin, function(rvout, rvin) {
+              lib.prepare_vout(rtx.vout, rtx.txid, vin, ((typeof rtx.vjoinsplit === 'undefined' || rtx.vjoinsplit == null) ? [] : rtx.vjoinsplit), function(rvout, rvin) {
                 lib.calculate_total(rvout, function(total){
                   if (!rtx.confirmations > 0) {
                     var utx = {

views/tx.pug

@@ -73,9 +73,12 @@ block content
                     else
                       - var ramount = r.amount / 100000000
                       tr
-                        td 
-                          a.loading(href='/address/' + r.addresses) 
-                            =r.addresses
+                        td
+                          if r.addresses != 'private_tx'
+                            a.loading(href='/address/' + r.addresses) 
+                              =r.addresses
+                          else
+                            =settings.locale.hidden_sender
                         td.danger.hidden-xs #{ramount.toFixed(8)}
                       tr.hidden-lg.hidden-md
                           td.danger #{ramount.toFixed(8)} #{settings.symbol}
@@ -96,10 +99,18 @@ block content
                   if tx.vout.length > 0 
                     - var ramount = r.amount / 100000000  
                     tr
-                      td 
-                        a.loading(href='/address/' + r.addresses) 
-                          =r.addresses 
-                      td.success.hidden-xs #{ramount.toFixed(8)}
+                      if r.addresses != 'private_tx'
+                        td 
+                          a.loading(href='/address/' + r.addresses) 
+                            =r.addresses 
+                        td.success.hidden-xs #{ramount.toFixed(8)}
+                      else if r.amount > 0
+                        td
+                          =settings.locale.hidden_recipient
+                        td.success.hidden-xs #{ramount.toFixed(8)}
+                      else
+                        td(colspan='2')
+                          =settings.locale.hidden_recipient
                     tr.hidden-lg.hidden-md
                       td.success #{ramount.toFixed(8)} #{settings.symbol}
                   else